Can you help me to identify the coveralls? [Movie: 6 days (2017)]

First of all, my apologies if this is considered against the rules since the question is based on a movie and also appear in some videogames.

I was wondering if any of you could help me identify the Coveralls this supposed members of the SAS are wearing. The movie is 6 Days (2017) based on the assault of the Iranian embassy in London in 1980 during the Operation Nimrod. The original ones were just plain black Royal Tanker Crew coveralls but they doesn't look to me like the ones in the movie.

Thank you in advance, ladies and gentleman.

Also, if you didn't watch the movie give it a try, is a jewel.